Interceptor doesn't work

**oliosien** · Aug 18th, 2011, 11:31 AM

Hi all,
I am working with Spring 3.1.0.M2 and I configured controllers by @Controller and @RequestMapping annotations.

I want to intercept all client request (*) with an Interceptor which implements HandlerInterceptor class which belongs to spring-framework.

I configured all what I need in my xml configuration file:

Code:

<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
  <property name="interceptors">
    <list>
      <bean class="it.mypackage.MyInterceptor" />
    </list>
  </property>
</bean>

and I wrote myInterceptor class which implements HandlerInterceptor

Code:

public class MyInterceptor implements HandlerInterceptor {
	
  @Override
  public void afterCompletion(
  ...

but the requests aren't intercepted by MyInterceptor, maybe there is a mistake in the configuration file. Anyone could help me?

Thanks in advance,

Enrico

**Marten Deinum** · Aug 19th, 2011, 01:05 AM

And in which configuration file did you add the DefaultAnnotationHandlerMapping? It should be in the context created by the DispatcherServlet NOT the one create by the ContextLoaderListener. If that doesn't solve it post your configuration and your interceptor...

**oliosien** · Aug 19th, 2011, 03:25 AM

Hi Marten, thx a lot 4 your help,

Originally Posted by Marten Deinum

And in which configuration file did you add the DefaultAnnotationHandlerMapping? It should be in the context created by the DispatcherServlet NOT the one create by the ContextLoaderListener. If that doesn't solve it post your configuration and your interceptor...

Yes, my DispatcherServlet has name "spitter" as <servlet-name> in web.xml and I wrote the interceptor configuration in spitter-servlet.xml. In web.xml I declare
<url-pattern>*.do</url-pattern> also, but I don't declare anymore about pattern when I defined interceptors, could it be an mistake? Do I have to declare it?

**Marten Deinum** · Aug 19th, 2011, 03:29 AM

As I mentioned earlier post your configuration...

**oliosien** · Aug 19th, 2011, 03:55 AM

Ok, thx Marten, this my web.xml:

Code:

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">

	<display-name>Spring-3</display-name>

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			/WEB-INF/myApplicationContext.xml
		</param-value>
	</context-param>

  	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>

    <servlet>
	    <servlet-name>spitter</servlet-name>
	    <servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
	    <load-on-startup>1</load-on-startup>
    </servlet>

    <servlet-mapping>
	    <servlet-name>spitter</servlet-name>
	    <url-pattern>*.do</url-pattern>
    </servlet-mapping>
 
</web-app>

this my spitter-servlet.xml:

Code:

<?xml version="1.0" encoding="UTF-8"?>

<beans 
    xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	
	<!-- Per le richieste statiche -->
	<mvc:resources mapping="/resources/**" location="/resources/" />
	
	<mvc:annotation-driven/>
	 
	<context:component-scan base-package="it.intesys.spring" />

	<bean id="configurationLoader"  class="org.springmodules.validation.bean.conf.loader.annotation.AnnotationBeanValidationConfigurationLoader"/>  
    
        <bean id="validator" class="org.springmodules.validation.bean.BeanValidator" p:configurationLoader-ref="configurationLoader"/>  

	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
		<property name="interceptors">
			<list>
				<bean class="it.intesys.spring.interceptor.MyInterceptor" />
			</list>
		</property>
	</bean>

</beans>

and finally this is MyInterceptor.java

Code:

package it.intesys.spring.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor implements HandlerInterceptor {
	
	@Override
	public void afterCompletion(HttpServletRequest arg0,
			HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {

		System.out.println("afterCompletion");
		
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2, ModelAndView arg3) throws Exception {
		
		System.out.println("postHandle");
		
	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2) throws Exception {

		System.out.println("preHandle");
		
		return false;
	}

}

and also post my controller:

Code:

package it.intesys.spring.mvc;

import it.intesys.spring.bean.Book;

import java.util.Map;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Validator;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping({"/homecontroller"})
public class MyHomeController 
{

	@Autowired
	private Validator validator;  
    
        public void setValidator(Validator validator) {  
           this.validator = validator;  
        }  

	@RequestMapping(value="/book.do", method=RequestMethod.GET)
	public String prepareBookForm(Map<String, Object> model) {
		
		model.put("book", new Book());
		
		return "home";
		
	}

}

**oliosien** · Aug 19th, 2011, 04:18 AM

Thx Marten, I post my configuration:

web.xml:

Code:

	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>
			/WEB-INF/myApplicationContext.xml
		</param-value>
	</context-param>

  	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>

    <servlet>
	    <servlet-name>spitter</servlet-name>
	    <servlet-class>
			org.springframework.web.servlet.DispatcherServlet
		</servlet-class>
	    <load-on-startup>1</load-on-startup>
    </servlet>
    
    <servlet-mapping>
	    <servlet-name>spitter</servlet-name>
	    <url-pattern>*.do</url-pattern>
    </servlet-mapping>

spitter-servlet.xml

Code:

<?xml version="1.0" encoding="UTF-8"?>

<beans 
    xmlns="http://www.springframework.org/schema/beans"
	xmlns:p="http://www.springframework.org/schema/p" 
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:mvc="http://www.springframework.org/schema/mvc"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/mvc
	http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
	http://www.springframework.org/schema/beans
	http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
	http://www.springframework.org/schema/context
	http://www.springframework.org/schema/context/spring-context-3.0.xsd">
	
	<!-- Per le richieste statiche -->
	<mvc:resources mapping="/resources/**" location="/resources/" />
	
	<mvc:annotation-driven/>
	 
	<context:component-scan base-package="it.intesys.spring" />

	<bean id="configurationLoader"  class="org.springmodules.validation.bean.conf.loader.annotation.AnnotationBeanValidationConfigurationLoader"/>  
    
        <bean id="validator" class="org.springmodules.validation.bean.BeanValidator" p:configurationLoader-ref="configurationLoader"/>  

	<bean class="org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping">
		<property name="interceptors">
			<list>
				<bean class="it.intesys.spring.interceptor.MyInterceptor" />
			</list>
		</property>
	</bean>

</beans>

and, finally, MyInterceptor.java:

Code:

package it.intesys.spring.interceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

public class MyInterceptor implements HandlerInterceptor {
	
	@Override
	public void afterCompletion(HttpServletRequest arg0,
			HttpServletResponse arg1, Object arg2, Exception arg3)
			throws Exception {

		System.out.println("afterCompletion");
		
	}

	@Override
	public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2, ModelAndView arg3) throws Exception {
		
		System.out.println("postHandle");
		
	}

	@Override
	public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,
			Object arg2) throws Exception {

		System.out.println("preHandle");
		
		return false;
	}

}

**Marten Deinum** · Aug 19th, 2011, 04:31 AM

You use mvc:annotation-driven which overrides your configuration... I suggest a read of the reference guide how to register interceptors with the namespace...

**oliosien** · Aug 19th, 2011, 07:28 AM

Thx a lot Marten, you're right and I found the solution:

Code:

        ...
	<mvc:annotation-driven/>
	 
	<mvc:interceptors>
		<bean class="it.intesys.spring.interceptor.MyInterceptor" />
	</mvc:interceptors>
        ...

with the namespace it works fine. Thanks a lot again.

Enrico

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